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Rossi A, Kristufek P, Levine BE, Thomson MH, Till D, Kottakis J, Della Cioppa G; Formoterol in Chronic Obstructive Pulmonary Disease (FICOPD) II Study Group.Rossi A, et al.Chest. 2002 Apr;121(4):1058-69. doi: 10.1378/chest.121.4.1058.Chest. 2002.PMID: 11948033Clinical Trial.
Vervloet D, Ekström T, Pela R, Duce Gracia F, Kopp C, Silvert BD, Quebe-Fehling E, Della Cioppa G, Di Benedetto G.Vervloet D, et al.Respir Med. 1998 Jun;92(6):836-42. doi: 10.1016/s0954-6111(98)90385-7.Respir Med. 1998.PMID: 9850367Free article.Clinical Trial.